403216131 has 4 divisors (see below), whose sum is σ = 537621512. Its totient is φ = 268810752.

The previous prime is 403216129. The next prime is 403216169. The reversal of 403216131 is 131612304.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 403216131 - 2¹ = 403216129 is a prime.

It is a super-2 number, since 2×403216131² = 325166496597218322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403216098 and 403216107.

It is not an unprimeable number, because it can be changed into a prime (403216111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67202686 + ... + 67202691.

It is an arithmetic number, because the mean of its divisors is an integer number (134405378).

Almost surely, 2^403216131 is an apocalyptic number.

403216131 is a deficient number, since it is larger than the sum of its proper divisors (134405381).

403216131 is a wasteful number, since it uses less digits than its factorization.

403216131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134405380.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 403216131 is about 20080.2423043150. The cubic root of 403216131 is about 738.7757520920.

Adding to 403216131 its reverse (131612304), we get a palindrome (534828435).

The spelling of 403216131 in words is "four hundred three million, two hundred sixteen thousand, one hundred thirty-one".